2.3 Shoot & Leaf Growth Flashcards

1
Q

When is Shoot and Leaf Growth in the Northern Hemisphere?

A

March–July

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

When is Shoot and Leaf Growth in the Southern Hemisphere?

A

September–January

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is Shoot and Leaf Growth?

A

When the shoots continue to grow, and leaves and inflorescences (a cluster of flowers on a stem) mature.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

When does the fastest rate of shoot and leaf growth occur?

A

The fastest rate of growth generally occurs between budburst and flowering

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What initially supports shoot growth?

A
  • Initially: Carbohydrates stored in the roots, trunk and branches of the vine support the initial shoot growth.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What eventually supports shoot growth?

A
  • As leaves develop and mature, they provide energy for further growth via photosynthesis, and therefore need adequate warmth and sunlight for this to take place.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What 4 factors might contribute to low carbohydrate levels?

A
  • Excessive leaf removal
  • Water stress
  • Mildew infections
  • High crop loads in the previous growing season
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What main problem can occur during shoot and leaf growth? Why is this problematic?

A

Water stress

  • Can limit photosynthesis and shoot growth
  • Can limit nutrient uptake through the roots
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What does stunted shoot growth lead to?

A
  • Small, weak shoots
  • A reduction in leaf number or smaller leaves
  • Inflorescences that do not flower properly
  • Grape bunches that do not ripen fully
  • Poor quality
  • Lower yields
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What does the vine needs during this stage? What are some adverse conditions?

A

What the vine needs during this stage:

  • Stored Carbohydrates
  • Warmth, sunlight, nutrients and water

Adverse conditions:

  • Low carbohydrate levels (caused by conditions in the previous growing season)
  • Water stress
How well did you know this?
1
Not at all
2
3
4
5
Perfectly